pka_value	data_source	charge_state_pre	charge_state_post	microspecies_pre	microspecies_post	molid	smiles
6.26	IUPAC digitized pKa	0	-1	Cn1cnc2ncc(=O)[nH]c2c1=O	Cn1cnc2ncc(=O)[n-]c2c1=O	mol10109	Cn1cnc2ncc(=O)[nH]c2c1=O